A multifunctional far-infrared heating device

Abstract

This utility model relates to a multifunctional far-infrared heating device, which includes a panel, a base, a mounting base, a heating element, and a temperature and water level sensor assembly. A raised heat insulation seat is located at the center of the heating groove. The temperature and water level sensor assembly is slidably mounted on a first, second, and third central hole. A microswitch is located at the bottom of the base. This utility model effectively blocks the influence of the high temperature of the heating element on the temperature sensor through the heat insulation seat. Furthermore, the microswitch, in conjunction with the extension and retraction action of the temperature sensor, is used to connect or disconnect the power supply to the heating element and to detect the presence of a container on the panel. If no container is present, the power supply to the heating element is cut off, achieving a power-off protection function. Additionally, the temperature and water level sensor assembly can detect the water level in the container to prevent dry burning. Therefore, this multifunctional far-infrared heating device has functions such as accurate temperature measurement, water level detection to prevent dry burning, and power-off protection.

Description

Technical Field

[0001] This utility model relates to the technical field of heating devices, and in particular to a multifunctional far-infrared heating device. Background Technology

[0002] The existing temperature and water level detection probes for heating appliances such as induction cookers and ceramic cookers are generally set on one side or the center of the panel. However, the above-mentioned temperature and water level detection probes have the following shortcomings: (1) The existing temperature and water level detection probes have a single function, which is only used for temperature measurement. (2) When the temperature and water level detection probe is set on one side of the panel, it is in contact with the side of the container. The container and the temperature and water level detection probe are easy to detach, resulting in inaccurate temperature measurement. (3) When the temperature and water level detection probe is set at the center of the panel, there is no heat insulation between the temperature and water level detection probe and the heating element, or the heat insulation is too small. This makes the temperature and water level detection probe easily affected by the heating element, resulting in inaccurate temperature measurement. Utility Model Content

[0003] The purpose of this utility model is to provide a multifunctional far-infrared heating device with accurate temperature measurement, water detection and anti-dry burning, and power failure protection.

[0004] The purpose of this utility model is achieved as follows:

[0005] A multifunctional far-infrared heating device includes a panel, a bottom shell, a mounting base, a heating element, and a temperature and water level sensor assembly. The panel covers the top opening inside the bottom shell, and the mounting base is located inside the bottom shell. The top surface of the mounting base has a heating groove, and the heating element is located inside the heating groove. A raised heat insulation seat is located at the center of the heating groove, and the diameter of the heat insulation seat ranges from 40mm to 80mm. The center of the panel, the center of the mounting base, and the center of the bottom shell correspond to the temperature and water level sensor assembly, respectively, with a first center hole, a second center hole, and a third center hole. The temperature and water level sensor assembly is slidably mounted on the first center hole, the second center hole, and the third center hole. A micro switch is located at the bottom of the bottom shell, below the temperature and water level sensor assembly. A spring is located inside the second center hole, and the upper end of the spring drives the temperature and water level detection probe of the temperature and water level sensor assembly to extend upward out of the first center hole. This invention effectively blocks the influence of the high temperature of the heating element on the temperature sensor through a heat-insulating base. Furthermore, the microswitch in conjunction with the temperature sensor's extension and retraction action is used to connect or disconnect the power supply to the heating element, and also to detect the presence of a container on the panel. If no container is present, the power supply to the heating element is cut off, providing power-off protection. Additionally, the temperature and water level sensor assembly of this invention can detect the water level in the container, preventing dry burning. Therefore, this multifunctional far-infrared heating device has functions such as accurate temperature measurement, water level detection and dry-burn prevention, and power-off protection.

[0006] The present invention can be further improved in the following ways.

[0007] The heat insulation base has a diameter of 70mm. This diameter completely blocks the heat from the heating device, thus ensuring accurate temperature measurement by the temperature and water level sensor assembly.

[0008] The heating device is a heating wire, heating tube, heating plate, thick film heater, halogen tube, or carbon fiber tube.

[0009] The heat insulation base and the mounting base are integrated into one unit, which facilitates processing and installation.

[0010] A fixed cylinder is installed on the first central hole, the second central hole, and the third central hole, and the temperature and water level sensor assembly is slidably mounted on the fixed cylinder.

[0011] The bottom of the base shell is equipped with a heat insulation plate. The temperature and water level sensor assembly includes a telescopic cylinder, a temperature and water level detection probe, a limiting clip, and a connecting seat. The telescopic cylinder slides up and down on the fixed cylinder. The temperature and water level detection probe is located at the upper end of the telescopic cylinder and contains a thermistor. The heat insulation plate, connecting seat, limiting clip, and micro switch are located below the base shell. The heat insulation plate is fixedly connected to the base shell. The lower end of the telescopic cylinder passes downward through the panel, mounting base, base shell, heat insulation plate, and connecting seat in sequence. The outer side wall of the lower end of the telescopic cylinder engages with the limiting clip. The outer side wall of the telescopic cylinder is provided with a limiting step. The limiting clip and the limiting step cooperate to fix the connecting seat on the outer side wall of the telescopic cylinder. A spring is sleeved between the telescopic cylinder and the fixed cylinder. The upper and lower ends of the spring abut against the outer side wall of the telescopic cylinder and the heat insulation plate, respectively.

[0012] The bottom surface of the base shell is recessed upwards at its center to form an installation cavity. The heat insulation plate, connecting seat, limit clamp, micro switch, lower end of telescopic cylinder and connecting seat are located in the installation cavity.

[0013] The temperature and water level detection probe is made of metal for electrical and thermal conductivity. This invention uses the probe as a capacitive electrode, monitoring real-time changes in capacitance within the container. Since water has a much higher dielectric constant than air, as the water level rises, the medium between the electrodes gradually changes from air to water, increasing the overall dielectric constant and thus the capacitance. Changes in water level directly alter the dielectric constant or effective area, thereby changing the capacitance. This temperature and water level detection probe accurately determines the water level, effectively preventing dry burning and enhancing the safety and intelligence of this invention.

[0014] This invention also includes a support base and a temperature sensor for the heating element. The support base is fixed to the bottom of the base shell, and the base shell has a clearance hole corresponding to the support base. A mounting hole is provided on the mounting base corresponding to the position of the support base, with the upper end of the mounting hole communicating with the heating groove. The top of the support base extends into the mounting hole through the clearance hole. The support base has a clearance channel, and the temperature sensor for the heating element is installed in the clearance channel. The top end of the temperature sensor extends upward through the clearance channel and into the heating groove, abutting against the heating element. The temperature sensor for the heating element in this invention is a thermocouple. This invention uses a temperature sensor to detect the operating temperature of the heating element in real time, ensuring stable operation and more precise temperature control.

[0015] The support base has a wiring channel for the power cord of the heating device. The top of the wiring channel is connected to the heating groove. The power cord of the heating device passes downward through the wiring channel, allowing it to extend out of the heating groove. After extending out, the power cord is electrically connected to the control circuit board. The power cord routing of the heating device in this invention is reasonable.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention effectively blocks the influence of the high temperature of the heating element on the temperature sensor through a heat-insulating base. Furthermore, the microswitch in conjunction with the temperature sensor's extension and retraction action is used to connect or disconnect the power supply to the heating element and to detect the presence of a container on the panel. If no container is present, the power supply to the heating element is cut off, providing power-off protection. Additionally, the temperature and water level sensor assembly can detect the water level in the container, preventing dry burning. Therefore, this multifunctional far-infrared heating device features accurate temperature measurement, water level detection to prevent dry burning, and power-off protection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the multifunctional far-infrared heating device according to Embodiment 1 of this utility model.

[0019] Figure 2 This is a structural schematic diagram of the multifunctional far-infrared heating device according to Embodiment 1 of this utility model from another angle.

[0020] Figure 3 This is a top view of the multifunctional far-infrared heating device according to Embodiment 1 of this utility model.

[0021] Figure 4 yes Figure 3 Sectional view at point AA.

[0022] Figure 5 yes Figure 3 Sectional view at point BB.

[0023] Figure 6 This is an exploded view of the multifunctional far-infrared heating device of Embodiment 1 of this utility model (heating device omitted). Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Example 1, as Figures 1 to 6 As shown, a multifunctional far-infrared heating device includes a panel 1, a bottom shell 2, a mounting base 3, a heating device 34, a temperature and water level sensor assembly 4, a support base 19, and a heating device temperature sensor 14. The panel 1 covers the top opening inside the bottom shell 2. The mounting base 3 is located inside the bottom shell 2. The top surface of the mounting base 3 is provided with a heating groove 31. The heating device 34 is located inside the heating groove 31. The center of the heating groove 31 is provided with a raised heat insulation seat 32. The diameter of the heat insulation seat 32 ranges from 40mm to 80mm. The center of panel 1, the center of mounting base 3, and the center of bottom shell 2 are respectively provided with a first center hole 13, a second center hole 33, and a third center hole 23 for the temperature and water level sensor assembly 4. The temperature and water level sensor assembly 4 is slidably mounted on the first center hole 13, the second center hole 33, and the third center hole 23. A micro switch 8 is provided at the bottom of bottom shell 2. The micro switch 8 is located below the temperature and water level sensor assembly 4. A spring 7 is provided in the second center hole 33. The upper end of the spring 7 drives the temperature and water level detection probe of the temperature and water level sensor assembly 4 to extend upward out of the first center hole 13.

[0026] This is a more specific technical solution of the present invention.

[0027] The diameter of the heat insulation seat 32 is 70mm.

[0028] The heating device 34 is a heating wire, heating tube, heating plate, thick film heater, halogen tube, or carbon fiber tube.

[0029] The heat insulation seat 32 and the mounting seat 3 are integrated into one unit.

[0030] The heat insulation seat 32 and the mounting seat 3 are made of high temperature resistant and insulating materials.

[0031] A fixed cylinder 6 is installed on the first central hole 13, the second central hole 33, and the third central hole 23, and the temperature and water level sensor assembly 4 is slidably mounted on the fixed cylinder 6.

[0032] The bottom of the base shell 2 is provided with a heat insulation plate 10. The temperature and water level sensor assembly 4 includes a telescopic cylinder 5, a temperature and water level detection probe 40, a limiting clamp 11, and a connecting seat 9. The telescopic cylinder 5 is slidably mounted on the fixed cylinder 6. The temperature and water level detection probe 40 is located at the upper end of the telescopic cylinder 5. A thermistor 41 is provided inside the temperature and water level detection probe 40. The heat insulation plate 10, the connecting seat 9, the limiting clamp 11, and the micro switch 8 are located below the base shell 2. The heat insulation plate 10 is fixedly connected to the base shell 2. The lower end of the telescopic cylinder 5 passes through the panel 1, mounting base 3, bottom shell 2, heat insulation plate 10 and connecting base 9 in sequence. The outer side wall of the lower end of the telescopic cylinder 5 is engaged with the limiting ear 11. The outer side wall of the telescopic cylinder 5 is provided with a limiting step 51. The limiting ear 11 and the limiting step 51 cooperate to fix the connecting base 9 on the outer side wall of the telescopic cylinder 5. The spring 7 is sleeved between the telescopic cylinder 5 and the fixed cylinder 6. The upper end and the lower end of the spring 7 abut against the outer side wall of the telescopic cylinder 5 and the heat insulation plate 10, respectively.

[0033] The temperature and water level detection probe 40 is provided with a first lead, and the thermistor 41 is provided with a second lead and a third lead. The first lead is used to transmit the capacitance signal to the control circuit board, and the second and third leads are used to transmit the resistance signal to the control circuit board.

[0034] The bottom center of the bottom shell 2 is recessed upward to form an installation cavity 12. The heat insulation plate 10, the connecting seat 9, the limiting ear 11, the micro switch 8, the lower end of the telescopic cylinder 5 and the connecting seat 9 are located in the installation cavity 12.

[0035] The support base 19 is fixed to the bottom of the bottom shell 2. The bottom shell 2 is provided with a clearance hole 18 corresponding to the support base 19. The mounting base 3 is provided with a mounting hole 15 corresponding to the position of the support base 19. The upper end of the mounting hole 15 is connected to the heating groove. The top of the support base 19 extends into the mounting hole 15 through the clearance hole 18. The support base 19 is provided with a clearance channel 16. The heating device temperature sensor 14 is installed in the clearance channel 16. The top end of the heating device temperature sensor 14 passes upward through the clearance channel 16. The top end of the heating device temperature sensor 14 extends into the heating groove 31 and abuts against the heating device 34.

[0036] The support base 19 has a wiring channel 17 for the power cord of the heating device 34. The top of the wiring channel 17 is connected to the heating groove 31. The power cord of the heating device passes downward through the wiring channel 17, thereby achieving the purpose of the power cord extending out of the heating groove. After extending out, the power cord is electrically connected to the control circuit board. The power cord routing of the heating device in this utility model is reasonable.

[0037] This utility model's temperature and water level detection probe is made of metal, preferably aluminum, for electrical and thermal conductivity. When used as a capacitor electrode, the probe monitors changes in capacitance within the container in real time. Water has a much higher dielectric constant than air; as the water level rises, the medium between the electrodes gradually changes from air to water, increasing the overall dielectric constant and capacitance. Changes in water level directly alter the dielectric constant or effective area, thus changing the capacitance. This probe accurately determines the water level, effectively preventing dry burning and enhancing the safety and intelligence of the invention. Furthermore, when used as a temperature sensor, the probe transfers heat from the container to a thermistor, which then sends a signal to the control circuit board.

[0038] When the container is placed on the panel, the temperature and water level sensor assembly is pressed downward by the container, that is, the telescopic cylinder 5, the temperature and water level detection probe 40, the limit clamp 11, and the connecting seat 9 move downward. The temperature and water level detection probe remains against the bottom of the container, the spring is compressed, and the connecting seat presses the first contact of the micro switch downward, so that the first contact of the micro switch and the second contact remain against each other. The circuit of the heating device is connected, and the heating device begins to heat the water in the container.

[0039] Conversely, when the container leaves the panel, the spring returns to its elastic deformation, and the temperature and water level sensor assembly is lifted by the spring. Due to the limiting of the connecting seat, the temperature and water level sensor assembly will not detach from the fixed cylinder. The connecting seat no longer presses down on the first contact of the micro switch, the first contact returns to its elastic deformation, the first contact of the micro switch separates from the second contact, the circuit of the heating device is cut off, and the heating device stops heating the container.

Claims

1. A multifunctional far-infrared heating device, comprising a panel (1), a bottom shell (2), a mounting base (3), and a heating device (34), wherein the panel (1) covers the top opening inside the bottom shell (2), the mounting base (3) is disposed inside the bottom shell (2), the top surface of the mounting base (3) is provided with a heating groove (31), and the heating device (34) is disposed inside the heating groove (31), characterized in that, It also includes a temperature and water level sensor assembly (4). The center of the heating groove (31) is provided with a raised heat insulation seat (32). The diameter of the heat insulation seat (32) is 40mm-80mm. The center of the panel (1), the center of the mounting base (3), and the center of the bottom shell (2) are respectively provided with a first center hole (13), a second center hole (33), and a third center hole (23) on the temperature and water level sensor assembly (4). The temperature and water level sensor assembly (4) is slidably mounted on the first center hole (13), the second center hole (33), and the third center hole (23). The bottom of the bottom shell (2) is provided with a micro switch (8). The micro switch (8) is located below the temperature and water level sensor assembly (4). A spring (7) is provided in the second center hole (33). The upper end of the spring (7) drives the temperature and water level detection probe (40) of the temperature and water level sensor assembly (4) to extend upward out of the first center hole (13).

2. The multifunctional far-infrared heating device according to claim 1, characterized in that, The diameter of the heat insulation seat (32) is 70 mm.

3. The multifunctional far-infrared heating device according to claim 1, characterized in that, The heating device (34) is a heating wire, heating tube, heating plate, thick film heater, halogen tube, or carbon fiber tube.

4. The multifunctional far-infrared heating device according to claim 1, characterized in that, The heat insulation seat (32) and the mounting seat (3) are integrated.

5. The multifunctional far-infrared heating device according to claim 1, characterized in that, A fixed cylinder (6) is installed on the first central hole (13), the second central hole (33) and the third central hole (23), and the temperature and water level sensor assembly (4) is slidably mounted on the fixed cylinder (6).

6. The multifunctional far-infrared heating device according to claim 5, characterized in that, The bottom of the base shell (2) is provided with a heat insulation plate (10). The temperature and water level sensor assembly (4) includes a telescopic cylinder (5), a temperature and water level detection probe (40), a limiting ear (11), and a connecting seat (9). The telescopic cylinder (5) slides up and down on the fixed cylinder (6). The temperature and water level detection probe (40) is located at the upper end of the telescopic cylinder (5). A thermistor (41) is provided inside the temperature and water level detection probe (40). The heat insulation plate (10), the connecting seat (9), the limiting ear (11), and the micro switch (8) are located below the base shell (2). The heat insulation plate (10) is fixedly connected to the base shell (2). The lower end of the telescopic cylinder (5) passes through the panel (1), mounting base (3), bottom shell (2), heat insulation plate (10) and connecting seat (9) in sequence. The outer side wall of the lower end of the telescopic cylinder (5) is engaged with the limiting ear (11). The outer side wall of the telescopic cylinder (5) is provided with a limiting step (51). The limiting ear (11) and the limiting step (51) cooperate to fix the connecting seat (9) on the outer side wall of the telescopic cylinder (5). The spring (7) is sleeved between the telescopic cylinder (5) and the fixed cylinder (6). The upper end and the lower end of the spring (7) abut against the outer side wall of the telescopic cylinder (5) and the heat insulation plate (10) respectively.

7. The multifunctional far-infrared heating device according to claim 6, characterized in that, The bottom center of the bottom shell (2) is recessed upward to form an installation cavity (12). The heat insulation plate (10), the connecting seat (9), the limiting ear (11), the micro switch (8), the lower end of the telescopic cylinder (5) and the connecting seat (9) are located in the installation cavity (12).

8. The multifunctional far-infrared heating device according to claim 1, characterized in that, It also includes a support base (19) and a heating device temperature sensor (14). The support base (19) is fixed to the bottom of the bottom shell (2). The bottom shell (2) is provided with a clearance hole (18) corresponding to the support base (19). The mounting base (3) is provided with a mounting hole (15) corresponding to the position of the support base (19). The upper end of the mounting hole (15) is connected to the heating groove. The top of the support base (19) extends into the mounting hole (15) through the clearance hole (18). The support base (19) is provided with a clearance channel (16). The heating device temperature sensor (14) is installed in the clearance channel (16). The top of the heating device temperature sensor (14) passes upward through the clearance channel (16). The top of the heating device temperature sensor (14) extends into the heating groove (31) and abuts against the heating device (34).

9. The multifunctional far-infrared heating device according to claim 8, characterized in that, The support base (19) has a wiring channel (17) for the power cord of the heating device (34). The top of the wiring channel (17) is connected to the heating groove (31), and the power cord of the heating device passes through the wiring channel (17) downwards.

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